Improvement in bilge-pumps



F. SMETHEYLLS.

Bilge-Pump.

Patented July 13, 1875.

wizmss s'. 14 24 mm PHOTO-UTNOGNAPHER. WASHINGTON, D C.

UNITED STA'rEs JOHNTF. SMETHELLS, OF CHICAGO, ILLIIvoI's;

IMPROVEMENT IN BlLG'E-P'UMPS.

Specification forming part of Letters Patent No.

165,623, dated July 13, 1875; application filed 7 March 15, 1875.

enable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawing forming partof this specification, in which Figure 1 is a sectional side elevationof the machine embodying my said invention. Fig. 2 is a vertical centralsection of the same, showing those parts which are at the left hand ofthe line a a drawn through Fig. 1,with pistons removed. Fig. 3 is avertical section, showing those parts which are at the right hand of theline w as drawn through Fig. 2, and Fig. 4 is a sectional plan taken 011the line y y drawn across Fig. 1.

Similar letters of reference indicate like parts in the several figuresof the drawing.

My invention has for its object to provide a pump for removing thebilge-water from a ship when at sea, and adapted to be operated by thepitching movement of the vessel. To that end it consists in the severalparts,-as will be more fully understood by the following description andclaims.

In the drawing, A represents a cylindrical case, which is mounted on asuitable framework, B, permanently attached to the keelson of thevessel. This'case is provided with a partition, G, forming two separatecylindrical chambers, D and D, the diameter of chamber D being greaterthan the diameter of chamber D, as shown in Figs. 2 and 4. E is ahorizontal shaft, which is journaled centrally in the cylinder-heads andpartition 0, and so arranged as to freely revolve. Mounted on thisshaft, within chambers D and D, are rotary piston-heads F and F, thediameter of which is slightly less than the diameter of their respectivechambers, forming annular cavities or chambers d d, as shown in Figs. 1and 3. Permanently secured to the inner periphery of the case, withinchamber (1, is a semi-annular ring, e, the lower end of which ischamfered to a feather-edge, the latter terminating at the wall of thecase, as shown in Fig. 1.

Permanently secured to the innerp'eriphery of the case, and withinchamber d, is an abutment, 6. (Shown in Fig. 3.) The periphery of eachpiston-head, F F ,is provided with radial grooves 6, within which issecured sliding pistons f and f, adjusted to bear against the innerperiphery of their respective cases. Each of the sliding pistons isprovided with a spring, 9, arranged between its inner edge and the baseof the groove, by which means the piston is moved outward against thewalls of the case.

The arrangement of these parts is such that when the piston-heads aremade to revolve, bringing the outer edge of the sliding pistons againstthe inclined surface of ring a and abutment 6, the springs yield andallow the pistons to move inward, so as to pass the ring and abutment,and, when the former have passed the latter, the springs expand,instantly moving the pistons outward across chambers 01 and d, andagainst the walls of the case.

Permanently attached to the lower surface of the case is apipe, G, the.cavity of which communicates with chamber d at a point near theabutment, and extending downward to a point near the ships keel.Attached to the case above and below its center, horizontally, are pipesH and H, the cavities of which comm unicate with chamber cl at a pointnear the ends of ring 6, as shown in Fig. 1. Permanently attached to theends of these pipes, opposite to the case, is a vertical pipe, J, thecavity of which communicates with the cavities of pipes H and H. Thelower end of pipe J extends downward through the keel of the vessel,into the water, and its upper end extends upward through the deck of thevessel. K is a check-valve, which is seated in pipe J at a pointslightly below the lower surface of the cavity in pipe H, and soadjusted as to be opened by the pressure of water against its lowersurface, and to reseat as the pressure is released. K is a like valve,which is seated within the lower end of pipe H, and so adjusted as to beopened by the pressure of water in the pipe, and to reseat'by theoverbalanced pressure of water in pipe J. Permanently attached to thecase is a pipe, L, its cavity, at its upper end, communicating withchamber d on the side of abutment e, opposite to pipe G, and at itslower end with the cavity of pipe H, slightly below chamber 61, as shownin Figs. 1 and 3.

My invention is operated in the following manner: As the vessel descendsthe'water is forced upward into pipe J, as indicated by arrow 1, andabove valve K, and when the vessel ascends the water recedes, causingthe valve to reseat, and the water above the valve passes from pipe J,through pipe H, as indicated by arrow 2, through chamber (1, to andagainst the sliding pistons f of pistonhead F, and exhausts through pipeH, into pipe J, as indicated by arrow 3, imparting a rotary motion tothe respective piston-heads F and F, and by the rotation of the latterpiston-head F the water in the "essel is drawn upward through pipe G,into chamber 61, as indicated by arrow 4, and forced therefrom, throughpipe L, into pipe J, by the velocity of the sliding pistons j", and itpasses off with the descending volume of water in the latter pipe belowvalve K.

Having thus described my invention, I claim- 1. In combination with thecase A, provided 3. In combination with pipe J, passing through the keelof the vessel, and adapted to fill with water as the vessel descends,the valves K and K, arranged to cause the column of water in the pipeabove valve K to descend through chamber at when the vessel ascends, asspecified.

4. The discharge-pipe L, communicating with chamber 61, and pipe H,whereby the water in said chamber is discharged into pipe J, asspecified.

The above specification signed by me this 6th day of March, 1875.

' JOHN F. SMETHELLS.

Witnesses:

G. H. FRosT, J. T. WHIPPLE.

